Forge Mod Loader Help - How can I change the starting ID?

FML automatically assigns block IDs now, it appears to start at 4096 and higher, however programs like MC Edit and plugins like World Edit can not handle a block ID outside of 0-4095 (it goes into integer overflow).

Being MC is not using all 4096 of those IDs, is there anyway to have it start with say 2048 so that all my mod blocks can be worked with in the editors? Working on updating an old pack/map and we really need this to succeed. Any help or advise is appreciated greatly.